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Old 09-18-2008, 06:27 PM
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Torque specs for Cast Iron block, but Aluminum engine componets

Ready to start building on my 454 block my question involves the top end proportion of the build. I'm putting on an Edelbrock top end kit(everything obviously consisting of aluminum.

http://store.summitracing.com/partde...5&autoview=sku

I eed to know which specs to go with eith the Cast Iron specs or the Aluminum block specs below. Any help on this would be greatly appreciated.

Chevrolet Big-Block
Iron Engines


Component Torque
Camshaft Sprocket Bolts 20 ft. lbs.
Cylinder Head Bolts Long 70 ft. lbs.
Short 70 ft. lbs.
Cylinder Head Studs Long 65 ft. lbs.
Short 65 ft. lbs.
Exhaust Manifold 20 ft. lbs.
Flywheel Bolts 60 ft. lbs.
Front Cover Bolts 75 inch lbs.
Intake Manifold 25 ft. lbs.
Main Bearing Bolts Inner 110 ft. lbs.
Outer 110 ft. lbs.
Oil Pan Bolts 165 inch lbs.
Rocker Arm Studs ( All ) 50 ft. lbs.
Rod Bearing Bolts ( 7/16in.) 67-73 ft. lbs.
Valve Cover Bolts 25 inch lbs.


Chevrolet Big-Block
Aluminum Engines


Component Torque
Bell housing 25 ft. lbs.
Camshaft Sprocket Bolts 20 ft. lbs.
Cylinder Head Bolts w/Hardened Washer Long 70 ft. lbs.
Short 70 ft. lbs.
Cylinder Head Studs Long 65 ft. lbs.
Short 60 ft. lbs.
Exhaust Manifold 20 ft. lbs.
Flywheel Bolts 60 ft. lbs.
Front Cover Bolts 75 inch lbs.
Intake Manifold 25 ft. lbs.
Oil Pan Bolts 165 inch lbs.
Rocker Arm Studs ( Aluminum head ) 50 ft. lbs.
Rod Bearing Bolts ( 7/16in.) 67-73 ft. lbs.
Valley Studs (4) 50-55 ft. lbs.
Valve Cover Bolts 25 inch lbs.


Source: http://members.tripod.com/torquespecs/hi_po_chev.htm

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Old 09-18-2008, 10:39 PM
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Why not listen to the ones that know best, the cylinder head manufacturer??

http://www.edelbrock.com/automotive_...6000/60449.pdf
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